Just count the calorie intake in which would be 90Cal per glass diluted for 200ml, but every cordial flavour is different, I don't how much it would ruin your water intake, but I would drink more water than sugared water.

Well if you're only adding a bit, it shouldn't make too much difference. I think their instructions usually say to add like, 1 part cordial to 5 parts water or something ridiculous so you'd be having a tiny fraction of their serving size calorie calculation

35kg lost. (November 2005 - October 2006)15kg gained again (as at October 2010).Back to the drawing board - Let's do this thing!